A speed bag is a small, air-filled punching bag that is mounted on a platform and designed to improve a boxer's hand-eye coordination, speed, and rhythm. It is typically made of leather or synthetic materials and is inflated to allow for quick rebounds when struck. Boxers use the speed bag to practice their punches and develop timing, as the bag moves rapidly in response to hits. The speed bag is often found in boxing gyms and is a staple training tool for professional and amateur fighters alike. Regular use can enhance a boxer's overall performance in the ring, making it an essential part of their training regimen. Many athletes also enjoy using the speed bag for fitness and conditioning purposes.